name = "zhangsan"
grade = 78

print(f'My nams is {name} , my grade is {grade}\n')

s1 = 72
s2 = 85
r =(s2-s1)/s1 * 100

print(f'last year: {s1}, this year: {s2}, up :{r:.1f}%,grade:{s1:2d}')

# 格式化输出字符串最好用的方式。
print('your grade is %d,your name is %s,up is %.1f%%'  %  (grade,name,r))   